Multiple nozzle vaporizing burner



Sept. 17, 1963 G. COGGIN 3,103,966

MULTIPLE NOZZLE VAPORIZING BURNER Filed Nov. 18, 1957 SOURCE OF AIR UNDER PEESSUKE E e SOURCE OF 380 FUEL SUPPLY INVENTOR. 519191 LJL ZJN United States Patent 3,103,966 MULTIPLE NGZZLE VAPORIZING BURNER Gray Coggin, 408 E. 4th St, Roswell, N. Mex. Filed Nov. 18, 1957, Ser. No. 697,235

5 Claims. (Cl. 15853) This invention relates to improvements in a burner, and particularly to a burner which is applicable for melting snow from runways, and for burning weeds, brush and the like from along highways, ditches,-fence rows and the like. This application is a continuation in part of my prior application, Ser. No. 308,840, filed Sept. 1952, for Burner Mechanisms, now abandoned, which in turn was a continuation in part and division of application, Ser. No. 725,419, Burner Mechanisms, filed Jan. 31, 1947, now Patent No. 2,610,622.

An object of the invention is to provide a burner of improved construction, to provide more elficient operation thereof in the use of butane, propane, hexane and other liquified petroleum gas. 7

Another object of the invention is to provide a burner whereby a forced draft ventilation is directed to the burner in such a manner as to provide forced air even when the burner is submerged in the products of combustion, which would otherwise choke out the flame.

A further object of the invention is to provide a burner element, the tubes of which are so constructed as to be resistant to being burned out by the extreme heat, and which burner mechanism directs both primary and secondary air therethrough in such manner as to produce intense heat, and at the same time cool the tubes of the burner.

Another object of the invention is to provide a burner, the tubes of which are so arranged as to focus a multiplicity of jets on a common pointso as to produce an intense flame, and wherein an expansion element is provided between an inner burner shell and an outer burner shell to prevent the joined members bursting apart due to the stress of heat expansion.

This invention is illustrated in the accompanying drawings, in which like reference characters designate like parts in the several views thereof, in which:

'FIG. 1 is a side elevational view of the burner, with parts broken away and with parts shown in section to bring out the details of construction, with parts shown diagrammatically; and

FIG. 2 is a sectional View taken on the line 2-2 of FIG. 1, looking in the direction indicated by the arrows.

With more detailed reference of the drawing the numeral 344 designates a power driven blower from which an air hose 342 leads, which air hose is connected to the air inlet of the burner which is designated generally at 350. The blower 344 is capable of supplying air to the hose 342 to convey a large volume of low pressure air to the burner.

The burner 350 comprises two major units 362 and 364, the portion 362 being an air inlet pipe, which is flanged onto the rearportion of a burner generating unit or burner'head 364; The burner generating unit or head comprises an inner cylindrical member 366 and an outer cylindrical member 368. The rear end of the outer cylindrical member is swaged inward and welded, or otherwise secured, in gas tight relation with the inner cylindrical member 366. A flange 370 is welded, or otherwise secured, on the rear end of cylindrical member 366, which flange is in complementary register with flange 3 72 on the adjacent end of air inlet tube 362. Bolts 374 secure the flanges 370 and 372 in abutting relation. A pair of lugs 376 are welded to the upper side of outer shell member 368 to receive a support member therebetween. An expansion flange is com- "ice posed of disc-like annular rings 37 8 and 380 which are welded together around the peripheries thereof, and at the inner diameters thereof, the rings 37;8 and 380 are Welded to inner cylindrical member 366 and to outer cylindrical member 368, respectively, so upon relative expansion between inner cylindrical member 366 and outer cylindrical member 368, the expansion member, comprising annular rings 3'78 and 380, will permit sufficient movement between the respective cylindrical members to prevent breaking the welds, or the like.

A fuel pipe 382 leads from a source of fuel supply to the upper portion of outer cylindrical member 368. The fuel pipe 382 has perforations 384 within the annular chamber formed between the outer cylindrical member 368 and the inner cylindrical member 366, so that the pipe 382 can discharge liquified petroleum fuel outward into the annular chamber 386 through the perforations 384 to be heated therein. The end of the pipe 382, within annular chamber 386, is closed, so that the 'fuel being discharged through the perforations will be evenly distributed along the top of the heated inner cylindrical member 366, so as to form a highly combustible gas mixture, when mixed with the correct proportion of air.

A plurality of burner tubes 338, three of which have been shown in the present device, are positioned at the inner end of inner cylindrical member 366 and are secured thereto as by welding, in such manner that the tubes are disposed at an acute angle with respect to the axis of inner cylindrical member 366. Air passage holes 390 are provided between the adjacent burner tubes 388, so that secondary air can be directed therethrough to further aid in the combustion of the gaseous fuel passing from nozzles 392 into the tubes 388. The nozzles 392 are centered with respect to the axis of the respective burner tubes 38%, and when the burner is lighted, will cause air to be directed through the burner tubes at high velocity, even if forced air draft from an air conduit 348 is not had. 7

The fuel which is passed into annular chamber 386, by fuel supply line 382, passes into pipe 394, which pipe is in communication with annular chamber 386, and thence through burner nozzles 3-92. By having the burner constructed in this particular manner, a highly combustible mixture can be produced, which will produce a flame of high heatintensity. 1

An arm 3% is secured to the outer face of annular ring 278, to enable an actuating element to be connected thereto for raising or lowering of the end of the burner head 364, so as to give the desired tilting movement. Lugs 376, which are attached to cylindrical shell Operation.

With the fuel being furnished to the burner from the fuel supply tank 252 in the desire-d amount and at the desired pressure, and with air being furnished to the burner in the desired volume, under pressure, the burner is ignited, and will perform an eflicient burning operation even if the burner is submerged in the products of combustion, which would otherwise choke out the flame.

An air supply hose 342 connects to the air inlet 362 of the burner and a flexible hose connects the fuel supply line to the burner to enable movement of the burner without impeding the supply of fuel or the supply of air thereto.

It is preferable to have the burner tubes 38% be made of stainless steel alloy, or other material that is highly heat resistant, which precludes the necessity of lining these tubes with fire clay, as has usually been the practice heretofore.

Having thus clearly shown and described the invention, what is claimed as new, and desired to be secured by Letters Patent is:

'l. A burner comprising:

(a) an inner cylindrical member,

(1) said inner cylindrical member having an open inlet end and an open outlet end,

(b) an outer cylindrical member surrounding said inner cylindrical member,

() ring-like means at opposite ends of said outer cylindrical member to close the space between said outer cylindrical member and said inner cylindrical member to form an annular chamber between said cylindrical members, which chamber is gas tight,

(d) a fuel supply line leading to and being in fluid communication with said annular chamber,

(e) a plurality of burner tubes mounted in said open inlet end of said inner cylindrical member,

(1) said burner tubes being positioned at an acute angle with respect to the axis of said inner cylindrical member,

(2) each of which burner tubes has an open inlet end and an open outlet end,

(f) a pipe leading from said annular chamber,

("1) the outer ends of said pipe which leads from said annular chamber terminating within the respective axes of said burner tubes,

(g) a burner nozzle mounted on and connected to each outer end of said pipe and being positioned within the axis of each said burner tube to direct fuel from said annular chamber into the open inlet end of each said burner tube,

(1) each burner nozzle being spaced from the inlet of the respective burner tubes to admit air therebtween into the respective burner tubes, and

(h) each said burner tube having meansforming a second air inlet substantially surrounding each said tube to admit air into said inner cylindrical member.

2. A burner comprising:

(a) an inner cylindrical member,

('1) said inner cylindrical member having an open inlet end and an open outlet end,

(b) an outer cylindrical member surrounding said inner cylindrical member,

(c) ring-like means at opposite ends of said outer cylindrical member to close the space between said outer cylindrical member and said inner cylindrical member to form an annular chamber between said cylindrical members, which chamber is gas tight,

(d) a fuel supply line leading to and being in fluid communication with said annular chamber,

(e) a plurality of burner tubes mounted in said open inlet end of said inner cylindrical member,

(1) said burner tubes being positioned at an acute angle with respect to the axis of said inner cylindrical member,

(2) each of which burner tubes has an open inlet end and an open outlet end,

(f) a pipe leading from said annular chamber,

(1) the outer ends of said pipe which leads from said annular chamber terminating within the respective axes of said burner tubes,

(g) a burner nozzle mounted on and connected to each outer end of said pipe and being positioned within the axis of each said burner tube to direct fuel from said annular chamber into the open inlet end of each said burner tube,

(1) each burner nozzle being spaced from the inlet of the respective burner tubes to admit air therebetween into the respective burner tubes,

(h) an air inlet pipe connected in fluid communication with the open inlet end of said inner cylindrical member and surrounding said burner tubes,

(i) a source supplying air under pressure,

(i) said inner cylindrical member and said burner tubes forming a second air inlet therebetween to substantially surround each said burner tube, and

(k) a conduit connecting said air inlet pipe with said source supplying air under pressure to direct said air to and around said burner tubes simultaneously to direct air into said inner cylindrical member.

3. A burner as defined in claim 1, wherein (a) said burner tubes are of a stainless steel alloy.

4. A burner as defined in claim 1, wherein (a) said fuel supply line extends into the upper portion of said annular chamber between said inner cylindrical member and said outer cylindrical member,

(1) the portion of said fuel supply line which extends into said annular chamber has spaced apart perforations formed in the upper side thereof throughout the length of said portion, for discharging fuel upward into said annular chamber, and

(b) the pipe which extends to said burner nozzles to supply fuel thereto leading from the lower part of said annular chamber.

5. A burner as defined in claim 1, wherein (a) said ring-like means on the outer end of said outer cylindrical member and the outer end of said inner cylindrical member is a pair of disc-like annular rings with the inner diameters of the respective rings of said pair of rings being secured in fluid tight relation respectively to the outer diameter of said outer cylindrical member and to the outer diameter of said inner cylindrical member in longitudinally spaced apart relation,

(1) the outer peripheries of said pair of disc-like annular rings being joined in abutting, fluid tight relation to form an expansion flange.

References Cited in the file of this patent UNITED STATES PATENTS 933,019 Chrisman Aug. 31, 1909 1,152,144 Caldwell Aug 31, 1915 1,434,263 Pippinger Oct. 31, 1922 1,626,785 Carter May 3, 1927 2,601,895 Garretson July 1, 1952 2,610,622 Coggin Sept. 16, 1952 2,667,919 Pardee et al Feb. 2, 1954 2,706,978 Larson Apr. 26, 1955 

1. A BURNER COMPRISING: (A) AN INNER CYLINDRICAL MEMBER, (1) SAID INNER CYLINDRICAL MEMBER HAVING AN OPEN INLET END AND AN OPEN OUTLET END, (B) AN OUTER CYLINDRICAL MEMBER SURROUNDING SAID INNER CYLINDRICAL MEMBER, (C) RING-LIKE MEANS AT OPPOSITE ENDS OF SAID OUTER CYLINDRICAL MEMBER TO CLOSE THE SPACE BETWEEN SAID OUTER CYLINDRICAL MEMBER AND SAID INNER CYLINDRICAL MEMBER TO FORM AN ANNULAR CHAMBER BETWEEN SAID CYLINDRICAL MEMBERS, WHICH CHAMBER IS GAS TIGHT, (D) A FUEL SUPPLY LINE LEADING TO AND BEING IN FLUID COMMUNICATION WITH SAID ANNULAR CHAMBER, (E) A PLURALITY OF BURNER TUBES MOUNTED IN SAID OPEN INLET END OF SAID INNER CYLINDRICAL MEMBER, (1) SAID BURNER TUBES BEING POSITIONED AT AN ACUTE ANGLE WITH RESPECT TO THE AXIS OF SAID INNER CYLINDRICAL MEMBER, (2) EACH OF WHICH BURNER TUBES HAS AN OPEN INLET END AND AN OPEN OUTLET END, (F) A PIPE LEADING FROM SAID ANNULAR CHAMBER, (1) THE OUTER ENDS OF SAID PIPE WHICH LEADS FROM SAID ANNULAR CHAMBER TERMINATING WITHIN THE RESPECTIVE AXES OF SAID BURNER TUBES, (G) A BURNER NOZZLE MOUNTED ON AND CONNECTED TO EACH OUTER END OF SAID PIPE AND BEING POSITIONED WITHIN THE AXIS OF EACH SAID BURNER TUBE TO DIRECT FUEL FROM SAID ANNULAR CHAMBER INTO THE OPEN INLET END OF EACH SAID BURNER TUBE, (1) EACH BURNER NOZZLE BEING SPACED FROM THE INLET OF THE RESPECTIVE BURNER TUBES TO ADMIT AIR THEREBTWEEN INTO THE RESPECTIVE BURNER TUBES, AND (H) EACH SAID BURNER TUBE HAVING MEANS FORMING A SECOND AIR INLET SUBSTANTIALLY SURROUNDING EACH SAID TUBE TO ADMIT AIR INTO SAID INNER CYLINDRICAL MEMBER. 